KR101735181B1 - Expansion valve for an air-conditioner of a vehicle - Google Patents

Expansion valve for an air-conditioner of a vehicle Download PDF

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Publication number
KR101735181B1
KR101735181B1 KR1020150067375A KR20150067375A KR101735181B1 KR 101735181 B1 KR101735181 B1 KR 101735181B1 KR 1020150067375 A KR1020150067375 A KR 1020150067375A KR 20150067375 A KR20150067375 A KR 20150067375A KR 101735181 B1 KR101735181 B1 KR 101735181B1
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KR
South Korea
Prior art keywords
port
flow path
sleeve
refrigerant
valve
Prior art date
Application number
KR1020150067375A
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Korean (ko)
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KR20160134984A (en
Inventor
이건호
권윤기
이용주
한준석
Original Assignee
학교법인 두원학원
주식회사 두원전자
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Priority to KR1020150067375A priority Critical patent/KR101735181B1/en
Publication of KR20160134984A publication Critical patent/KR20160134984A/en
Application granted granted Critical
Publication of KR101735181B1 publication Critical patent/KR101735181B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3227—Cooling devices using compression characterised by the arrangement or the type of heat exchanger, e.g. condenser, evaporator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H1/00885—Controlling the flow of heating or cooling liquid, e.g. valves or pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
    • B60H2001/006—Noise reduction

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Temperature-Responsive Valves (AREA)

Abstract

The present invention relates to an expansion valve for an air conditioner of a vehicle in which refrigerant flowing from a condenser is throttled and supplied to an evaporator, and the opening degree of which is controlled by a refrigerant flowing into the compressor from the evaporator, A first port, a second port through which the refrigerant throttled is supplied to the evaporator, a throttling channel in which the refrigerant flowing into the first port is throttled, and a second port communicated with the first port, A valve body having an internal flow path for discharging the refrigerant to the throttle channel; A sleeve for adjusting the opening degree of the throttle passage; a valve provided on the inner passage and having a support spring for elastically supporting the sleeve; And a nut member which is provided on an inner surface of the inner passage and supports the valve portion from below and is tightly fixed to an inner surface of the inner passage so that a lower end thereof hermetically seals the inner passage, And a hollow insertion portion protruding from the upper portion of the fixing portion and provided inside the inner flow passage, wherein the insertion portion is opened at an upper portion thereof, and the support spring and the sleeve Wherein an end of the insertion portion inserted in the inner flow path is located at an upper end of the first port formed on one surface of the inner flow path and the insertion portion is formed integrally with the fixing portion, Wherein the inserting portion is not displaced to one side in the internal flow passage by the first valve The.
Accordingly, since the support spring inserted into the inserting portion of the nut member is elongated so as not to be exposed to the outside of the inserting portion, the support spring can be prevented from being deformed by the coolant flowing into the first port, Is prevented from being deformed by the refrigerant, so that the sleeve provided at the upper portion of the support spring is located at the correct position, so that the noise generated when the sleeve is in an abnormal position can be prevented.

Description

[0001] The present invention relates to an expansion valve for an air conditioner,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expansion valve for an air conditioner of a vehicle, and more particularly to an expansion valve for an air conditioner for a vehicle applied to an air conditioner of a vehicle.

Korean Patent Publication No. 2011-0102520 discloses an air conditioner in which an automobile is heated or cooled so as to introduce or circulate the inside or outside of the automobile into an automobile room to keep the room temperature in an appropriate state to provide air for providing a comfortable ride to the occupant And a harmonizing device is provided. Such an air conditioner for a vehicle includes a cooling device for cooling the interior of the vehicle and a heating device for heating the interior of the vehicle. The cooling device is configured to cool the interior of the vehicle by heat exchange between the evaporator and the indoor / outdoor period during the process of circulating the heat exchange medium, which is discharged by driving the compressor, to the compressor through the condenser, the receiver dryer, the expansion valve and the evaporator. On the other hand, the heating device is configured to heat the interior of the vehicle by introducing the cooling water into the heater core and exchanging heat with the indoor / outdoor unit.

In recent years, L-type expansion valves have been widely used as the expansion valve. Referring to FIG. 1, the L-type expansion valve 1 includes a valve body 10, a first bracket 15, and a second bracket 16. The valve body 10 has a rectangular columnar shape. The first bracket 15 serves to mount the condenser outlet pipe 11 and the compressor inlet pipe 14 to the valve body 10 and the second bracket 16 is connected to the evaporator inlet pipe 12 and / And an evaporator outlet pipe (13) is mounted on the valve body (10). The expansion valve 1 includes a throttle channel for throttling the refrigerant flowing into the valve body 10 from the condenser outlet pipe 11 and a throttle valve 11 connected to the throttle valve outlet 10, An internal flow passage communicating with the pipe 11 is formed and a valve chamber is formed which is connected to a driving portion deformed by the refrigerant and is installed on the internal flow passage to receive a valve portion for controlling the opening degree of the throttle passage .

However, conventionally, the spring member of the valve portion is deformed in the inflow direction due to the pressure fluctuation of the refrigerant by the refrigerant flowing into the valve chamber by being connected to one side of the valve chamber through the condenser outlet pipe 11, There is a problem in that the ball located on the upper part of the member is biased in the lateral direction, resulting in noise due to the abnormal position of the ball.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a cooling device for an internal combustion engine in which a support spring formed in an insertion groove of an insertion portion by a coolant of a condenser, So that it is possible to suppress the generation of noise generated when the ball provided on the upper portion of the sleeve is shifted in the lateral direction, and an object of the present invention is to provide an expansion valve for an air conditioner.

In order to achieve the above object, the present invention provides an expansion valve for an air conditioner of a vehicle in which refrigerant flowing from a condenser is throttled and supplied to an evaporator, and the opening degree of which is controlled by a refrigerant flowing into the compressor, A first port through which the refrigerant flows from the condenser, a second port through which the refrigerant throttled is supplied to the evaporator, a throttling flow path through which the refrigerant flowing into the first port is throttled, And an internal flow passage for discharging the refrigerant flowing into the first port to the throttle channel; A sleeve for adjusting the opening degree of the throttle passage; a valve provided on the inner passage and having a support spring for elastically supporting the sleeve; And a nut member which is provided on an inner surface of the inner passage and supports the valve portion from below and is tightly fixed to an inner surface of the inner passage so that a lower end thereof hermetically seals the inner passage, And a hollow insertion portion protruding from the upper portion of the fixing portion and provided inside the inner flow passage, wherein the insertion portion is opened at an upper portion thereof, and the support spring and the sleeve Wherein an end of the insertion portion inserted in the inner flow path is located at an upper end of the first port formed on one surface of the inner flow path and the insertion portion is formed integrally with the fixing portion, Wherein the inserting portion is not displaced to one side in the internal flow passage by the first valve The.

In the expansion valve for an air conditioner according to the present invention, the first port may be formed on one surface of the inner flow path, and the condenser outlet pipe may be connected to one surface of the valve body, .

delete

The bottom surface of the insertion groove may have a fixing protrusion for fixing the support spring to the insertion groove.

The expansion valve for an air conditioner according to the present invention has the following effects.

First, the support member is prevented from being deformed by the coolant flowing into the first port because the support member is inserted into the inserting portion of the nut member.

Secondly, since the support spring is prevented from being deformed by the refrigerant, the sleeve provided on the upper portion of the support spring is located in the correct position, so that the noise generated when the sleeve is in an abnormal position can be prevented.

1 is a schematic perspective view of an expansion valve for an air conditioner of a vehicle having an L-type structure.
2 is a schematic configuration diagram of an air conditioner of a vehicle according to the present invention.
3 is a cross-sectional view schematically showing an internal structure of an expansion valve for an air conditioner of a vehicle according to the present invention.
Fig. 4 is an enlarged view of the main part of the expansion valve shown in Fig. 3;
5 is an enlarged perspective view of the nut member shown in Figs. 3 and 4. Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

FIG. 2 is a schematic structural view of a vehicle air-conditioning apparatus according to the present invention, FIG. 3 is a cross-sectional view schematically showing an internal structure of an expansion valve for an air conditioner of a vehicle according to the present invention, Fig. 5 is an enlarged perspective view of the nut member shown in Figs. 3 and 4. Fig.

2 to 5, an expansion valve (hereinafter referred to as an "expansion valve") 100 for an air conditioner according to an embodiment of the present invention throttles a refrigerant flowing in from a condenser 70, And the opening degree of the refrigerant is controlled by the refrigerant flowing in the evaporator 80 and flowing out to the compressor 60. The air conditioner performs functions of throttling and flow control in the air conditioner.

The refrigerant introduced into the compressor 60 is compressed in the compressor 60 at a high temperature and a high pressure, and then condensed in the condenser 70. The condensed refrigerant is throttled in the expansion valve 100, and then evaporated in the evaporator 80. The evaporated gas flows into the expansion valve 100 and is used to control the opening degree of the expansion valve 100, and then flows into the compressor 60 again.

Referring to FIG. 3, the expansion valve 100 includes a valve body 110, a valve unit 120, and a control valve 130.

The valve body 110 has a first port 111 through which refrigerant flows from the condenser 70 and a refrigerant throttled inside the valve body 110 is supplied to the evaporator 80 A second port 112 is formed. The valve body 110 is spaced upward from the second port 112 and has a third port 113 through which the refrigerant flows from the outlet of the evaporator 80, And a fourth port 114 through which the refrigerant introduced from the compressor 113 flows out to the compressor 60 is formed.

The first port 111 is formed on one side of the valve body 110 in a horizontal direction and the condenser outlet pipe 72 is inserted and the second port 112 is connected to the valve body 110 And on the other side in the horizontal direction, an evaporator inlet pipe (not shown) is inserted. The third port 113 is formed horizontally so as to be spaced apart from the second port 112 and inserted into an evaporator outlet pipe (not shown), and the fourth port 114 is connected to the valve body 110 And the compressor inlet pipe (not shown) is inserted into the third port 113 so as to have a direction perpendicular to the third port 113.

The valve body 110 includes a diverging flow passage 110a in which the refrigerant flowing into the first port 111 is contracted and a second port 111 communicating with the first port 111, An internal flow path 110b for discharging the refrigerant to the throttling flow path 110a is formed.

The valve portion 120 is accommodated in the inner passage 110b and the inner passage 110b is aligned with the diaphragm passage 110a in the vertical direction.

The valve unit 120 includes a sleeve 121 for regulating the opening of the throttling flow path 110a and a support spring 122 for elastically supporting the sleeve 121 on the inner flow path 110b. And a needle 123 coupled with the sleeve 121. The needle 123 is slidably inserted into a through hole formed along the vertical direction of the valve body 110 and the upper end of the needle 123 is engaged with the driving unit 140, Direction.

The sleeve 121 is installed on the diaphragm channel 110a and is fixed to the lower end of the needle 123 so that the opening of the diaphragm channel 110a is changed by moving the needle 123 in the vertical direction .

The support spring 122 is installed on the inner passage 110b to elastically support the sleeve 121 upward. Here, the lower end of the support spring 122 is seated inside the nut member 130 described later.

The driving unit 140 includes a diaphragm 141 and a stopper 142. The diaphragm 141 is coupled to the valve body 110 and driven using a diaphragm principle. The diaphragm 141 is deformed by the temperature and is deformed by the refrigerant flowing from the third port 113. The stopper 142 is connected to the diaphragm 141 and reciprocates vertically in accordance with the deformation of the diaphragm 141. The stopper 142 is connected to the needle 123, Thereby inducing movement. Here, the reference numerals 145, 146, and 147 denote an outer case, a cap, and a pressure chamber, respectively, and detailed configuration and operation of the driving unit 140 are substantially similar to those of a known driving unit of an expansion valve.

The nut member 130 is disposed on the inner flow path 110b and serves to support the valve portion 120 from below and the lower end of the nut member 130 is configured to seal the inner flow path 110b, And is tightly fixed to the inner surface of the inner passage 110b.

The nut member 130 includes a fixing portion 131 and an insertion portion 132 and the insertion portion 132 is provided with an insertion groove 133. The fixing portion 131 is fixedly attached to the inner surface of the inner passage 110b and the inserting portion 132 protrudes to the upper portion of the fixing portion 131 and is provided inside the inner passage 110b The insertion portion 132 is provided with an insertion groove 133 into which the support spring 122 and one end of the sleeve 121 are inserted.

The end of the insertion part 132 inserted into the internal flow path 110b may be positioned above the first port 111 formed on one surface of the internal flow path 110b.

The end of the insertion part 132 inserted into the internal flow path 110b is positioned above the first port 111 formed on one surface of the internal flow path 110b so that the refrigerant flowing into the first port 111 It is possible to prevent the support spring 122 from being deformed by the support spring 122 and prevent the support spring 122 from being deformed by the coolant so that the sleeve 121, Thereby preventing noise generated when the sleeve 121 is in an abnormal position.

And a fixing protrusion 133a for fixing the support spring 122 to the insertion groove 133 may be provided on the bottom surface of the insertion groove 133. [ The support spring 122 is inserted into the insertion groove 133 and then the lower end of the support spring 122 is fixed to the fixing protrusion 133a so that the support spring 122 is inserted into the insertion groove 133 of the nut member 130, So that the sleeve 121 is supported from the lower side.

The insertion portion 132 is formed long so as not to expose the support spring inserted into the insertion groove 133 of the nut member 130 to the outside of the insertion portion 132, It is possible to prevent the support spring 122 from being deformed and to prevent the support spring 122 from being deformed by the coolant by the nut member 130 so that the sleeve 121, The noise generated when the sleeve 121 is in an abnormal position can be prevented.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: expansion valve for air conditioner 110: valve body
111: first port 112: second port
113: third port 114: fourth port
120: valve portion 121: sleeve
122: support spring 123: needle
130: nut member 131:
132: insertion portion 133: insertion groove
140:

Claims (5)

An expansion valve for an air conditioner for a vehicle in which a refrigerant flowing from a condenser is throttled and supplied to an evaporator, and the opening degree is controlled by a refrigerant flowing in the evaporator and flowing out to a compressor,
A first port through which the refrigerant flows from the condenser; a second port through which the refrigerant throttled is supplied to the evaporator; a throttling flow path in which the refrigerant flowing into the first port is throttled; A valve body having an internal flow path for discharging the refrigerant flowing into the first port to the throttle channel;
A sleeve for adjusting the opening degree of the throttle passage; a valve provided on the inner passage and having a support spring for elastically supporting the sleeve; And
And a nut member which is provided on an inner surface of the inner passage to support the valve portion from below and is tightly fixed to an inner surface of the inner passage so that a lower end thereof hermetically seals the inner passage,
The nut member
A fixed portion tightly fixed to an inner surface of the inner flow path,
And a hollow insertion portion protruding from the upper portion of the fixing portion and provided inside the inner flow path,
The insertion portion is provided with an upper opening and an insertion groove into which the support spring and one end of the sleeve are inserted,
Wherein an end of the insertion portion inserted into the internal flow path is located at an upper end of the first port formed on one surface of the internal flow path,
Wherein the inserting portion is formed integrally with the fixing portion so that the inserting portion is not biased toward the one side in the inner flow path by the refrigerant.
The method according to claim 1,
Wherein the first port is formed on one side of the inner flow path, the condenser outlet pipe is connected to one surface of the valve body,
Wherein the first port is perpendicular to the throttle channel.
delete delete The method according to claim 1,
And a fixing protrusion for fixing the support spring to the insertion groove is provided on the bottom surface of the insertion groove.
KR1020150067375A 2015-05-14 2015-05-14 Expansion valve for an air-conditioner of a vehicle KR101735181B1 (en)

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KR1020150067375A KR101735181B1 (en) 2015-05-14 2015-05-14 Expansion valve for an air-conditioner of a vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150067375A KR101735181B1 (en) 2015-05-14 2015-05-14 Expansion valve for an air-conditioner of a vehicle

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KR20160134984A KR20160134984A (en) 2016-11-24
KR101735181B1 true KR101735181B1 (en) 2017-05-15

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101220978B1 (en) * 2010-01-20 2013-01-14 한라공조주식회사 Thermal expansion valve of air conditioner for vehicle
JP2013257064A (en) 2012-06-12 2013-12-26 Fuji Koki Corp Expansion valve
JP2014001895A (en) * 2012-06-19 2014-01-09 Fuji Koki Corp Expansion valve
JP2014238206A (en) 2013-06-07 2014-12-18 株式会社不二工機 Expansion valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101220978B1 (en) * 2010-01-20 2013-01-14 한라공조주식회사 Thermal expansion valve of air conditioner for vehicle
JP2013257064A (en) 2012-06-12 2013-12-26 Fuji Koki Corp Expansion valve
JP2014001895A (en) * 2012-06-19 2014-01-09 Fuji Koki Corp Expansion valve
JP2014238206A (en) 2013-06-07 2014-12-18 株式会社不二工機 Expansion valve

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